38
Algebra
The Root of a Quadratic Equation (only for problems
having a real root)
Calculation of time
Example 1:
The air flight departs at 2 o'clock 9 minutes
and 56 seconds (2
o
09'56"), and arrives at 4 o'clock
18 minutes and 23 seconds (4
o
18'23").
What is the travel time
Example 2:
The following shows the amount of time worked in
three days. What was the total time?
1st day : 5 hours 46 minutes (5
o
46')
2nd day : 4 hours 39 minutes (4
o
39')
3rd day : 3 hours 55 minutes (3
o
55')
